Abstract
There is more or less dead-time in the human transfer-function in manual operation. It isconsidered that dead-time is consisted to be in 3 parts, i. e., (a) time for recognizing the stimmulation, (b) time to calculate controlling the muscles, and (c) time to transmit the control signalthrough the nurves.
Active current was measured to obtain the mechanism of stimmulouse-recognition. The actioncurrent was induced from the surface of arm applying the indirect-induce electrodes. It wasamplified by a. c. amplifier (gain 100 dB, frequency range 1-1000c/s) and input stimulation toelectromagnetic oscillograph and the actual response were recorded simmultaneously.
The action current which is induced by indirect electrode is composition of controlling signalto the muscle and of feedback signal from the muscle. The controlling signal precedes about50-80ms to the actual movement of hand.
Both amplitudes of controlling signal and the feedback signal are proportionate to the logarithmof the stimmulation amplitude. Therefore they are the function of bits number of input-information, but there is some difference on the level of between two.
The movement of hand can be predicted by the controlling signal in the active current. Itseems that the controlling signal has two states, as the start signal and reset signal, and as it iscombination of feedback signal, it seems as if there are three states in the wave-envelope. Thatbecomes much clear when alignment amplifier of 200-400 c/s of high Q is provided. These signalsmay utilize for distance remote control devices for many industried purposes.
